1. In a small pharmacy, suppose there is an average of 2 prescriptions of a certain drug per week. Use Poisson tables to answer the following.
a. Find the probability that there are exactly 2 prescriptions for this drug in a given week.
b. Find the probability that there are no more than 5 prescriptions for this drug in a given week.
c. Find the probability that there is at least 1 prescription for this drug in a given week.
d. Suppose we observe 7 prescriptions for this drug in a given week. Would you consider this an unusually high number? Calculate a probability to justify your answer.
2. Let Z represent a standard Normal random variable.
a. Find P( Z < 1.96 )
b. Find P( Z < -3.03 )
c. Find P( Z > 0.67 )
d. Find P( -1.37 < Z < 2.60 )
e. P(Z <10)
f. Find the point C such that P( Z < C ) = .2
g. Find the point C such that P( Z > C ) = .33